接近太阳表面中心之处，一个黑子群清晰可见。

Close to the centre of the sun, a group of sunspots is visible.

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上星期，人们用地面望远镜观测到了这一太阳黑子群。

The monster spot came into view of Earth-bound telescopes last week.

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上星期，人们用地面望远镜观测到了这一太阳黑子群。

The monster spot came into view of Earth-bound telescopes last week.

youdao